SecureDrive is a unique program for Psion that allows you to keep your data in secure form without you having to think about it. All these actions are performed "on the fly" and are transparent to you. Program adds new disks visible as regular disks and you can work with them as with regular ones - store your files there, install applications onto these disks, run them, etc. But you can be sure that your data is confidential.

Moreover, you can immediately close the access to your data by locking a disk only without unmounting it (manually, by hotkey, when device cover is closed, etc). Also you can create disks without encrypting them, for ordering your files only and much more other functions.

More info is available at http://www.symbianwave.com/product.php?id=sd_epoc